公开(公告)号：US11781429B1

公开(公告)日：2023-10-10

申请号：US18332606

申请日：2023-06-09

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING ,  University of Mining and Technology-Beijing Inner Mongolia Research Institute

发明人： Yifan Zeng ,  Qiang Wu ,  Weihong Yang ,  Zhaolai Hua ,  Yanping Miao ,  Lu Wang ,  Kai Pang ,  Lei Yang ,  Aoshuang Mei ,  Shihao Meng ,  Han Bao ,  Xue Liu ,  Xuan Xiao

IPC分类号： E21D11/10 ,  E21D11/38 ,  E21B33/13

CPC分类号： E21D11/38 ,  E21B33/13 ,  E21D11/10

摘要： A method for blocking mine water inrush includes: grouting first slurry into an interface between the quaternary aquifer and the weathered bedrock aquifer in a fracture grouting manner until a first preset condition is met; forming a first water-resisting cushion after the first slurry is solidified; drilling a curve branch drill hole in the surface horizon downward; grouting second slurry into the curve branch drill hole in a downward grouting manner until a second preset condition is met; forming a second water-resisting cushion after the second slurry is solidified; grouting third slurry onto a top of the first water-resisting cushion in an upward grouting manner until a third preset condition is met; forming a third water-resisting cushion after the third slurry is solidified; wherein the third water-resisting cushion is located on the top of the first water-resisting cushion.

公开(公告)号：US12129620B1

公开(公告)日：2024-10-29

申请号：US18600416

申请日：2024-03-08

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

发明人： Yifan Zeng ,  Weihong Yang ,  Qiang Wu ,  Kai Pang ,  Xinjiang Wei ,  Xue Liu ,  Xuan Xiao ,  Aoshuang Mei ,  Shihao Meng ,  Chao Yu

IPC分类号： E21B33/13 ,  E02D3/12

CPC分类号： E02D3/12 ,  E02D2250/003 ,  E21B33/13

摘要： Disclosed is a method for repairing an aquifer in a coal mine area by grouting, including: drilling a survey hole in a ground area corresponding to a water inflow position from ground surface to a caving zone in a goaf; determining a target layer for grouting in the survey hole based on drilling data collected from the survey hole while drilling; changing the survey hole to a grouting hole; measuring a first water level from the grouting hole; grouting through the grouting hole; changing the grouting hole to an observation hole; measuring a second water level from the observation hole; and determining a water retention level based on the first water level and the second water level.

公开(公告)号：US12091972B1

公开(公告)日：2024-09-17

申请号：US18596373

申请日：2024-03-05

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

发明人： Yifan Zeng ,  Aoshuang Mei ,  Qiang Wu ,  Huaming Wei ,  Yashuai Cui ,  Shihao Meng ,  Weihong Yang ,  Kai Pang ,  Liang Yang ,  Yidi Xing

IPC分类号： E21C41/18 ,  E21C39/00 ,  E21F17/18

CPC分类号： E21C41/18 ,  E21C39/00 ,  E21C2100/00 ,  E21F17/18

摘要： Disclosed are a method and a related device for determining a development status of a separation layer in a coal mine. The method includes: obtaining surface subsidence variation data of the coal mine within a preset time interval, rock stress variation data of a caving zone of the coal mine and water pressure variation data; determining a height decrease of the caving zone based on the rock stress variation data and the water pressure variation data; and determining the development status of the separation layer of the coal mine based on the height decrease and the surface subsidence variation data.

公开(公告)号：US12091971B2

公开(公告)日：2024-09-17

申请号：US18346104

申请日：2023-06-30

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

发明人： Yifan Zeng ,  Shihao Meng ,  Qiang Wu ,  Lu Wang ,  Shijie Tang ,  Xuedong Kan ,  Chao Yu ,  Han Bao

IPC分类号： E21B47/11 ,  E21B33/124 ,  E21C39/00 ,  E21F16/00

CPC分类号： E21C39/00 ,  E21B33/1243 ,  E21B47/11 ,  E21F16/00

摘要： A tracer diffusion device includes: a first container, a second container, a drilling pipe, a unidirectional driving device, and a bidirectional driving device. The first container holds a first fluid containing a tracer. The second container holds a second fluid. A first end of the drilling pipe is connected to the first container; a second end of the drilling pipe is extended into a borehole and equipped with a first sealing capsule and a second sealing capsule. A plurality of through holes are arranged on the drilling pipe between the first sealing capsule and the second sealing capsule. The unidirectional driving device is arranged on the drilling pipe, for injecting the first fluid from the first container into the borehole between the first sealing capsule and the second sealing capsule. The bidirectional driving device is arranged between the second container and the first sealing capsule.